Hydrophobic membrane materials for filter venting applications
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United States of America Patent
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Apr 26, 2005
Grant Date -
Jul 29, 2004
app pub date -
Jan 8, 2004
filing date -
Apr 12, 2002
priority date (Note) -
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Abstract
The present invention relates to filtration media having both hydrophobic (water-repellent) properties. The filtration media are produced using a fluorothermoplastic material, such as a terpolymer of tetrafluoroethylene, vinylidene fluoride, and hexafluoropropylene. The invention also relates to methods of preparing such filtration media using casting solution phase inversion.
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